Abstract
Pollen and spores from a deep-sea core located west of the Niger Delta record an uninterrupted area of lowland rain forest in West Africa from Guinea to Cameroon during the last Interglacial and the early Holocene. During other periods of the last 150 ka, a savanna corridor between the western — Guinean — and the eastern — Congolian — part of the African lowland rain forest existed. This so-called Dahomey Gap had its largest extension during Glacial Stages 6, 4, 3, and 2. Reduced surface salinity in the eastern Gulf of Guinea as recorded by dinoflagellate cysts indicates sufficient precipitation for extensive forest growth during Stages 5 and 1. The large modern extension of dry forest and savanna in West Africa cannot be solely explained by climatic factors. Mangrove expansion in and west of the Niger Delta was largest during the phases of sea-level rise of Stages 5 and 1. During Stages 6, 4, 3, and 2, shelf areas were exposed and the area of the mangrove swamps was minimal.
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Agwu COC (1988) Verbreitung von Pollen. In: Lutze GF, et al. Bericht über die ‘Meteor’-Fahrt 6–5 Dakar-Libreville 15.1.–16.2.1988. Ber Geol Paläont Inst Univ Kiel 22: 25–26
Anhuf D (1994) Zeitlicher Vegetations- und Klimawandel in Côte d'Ivoire. In: Lauer, W (ed) Veränderungen der Vegetationsbedeckung in Côte d'Ivoire. Steiner, Stuttgart, pp 7–299
Bard E, Hamelin B, Fairbanks RG, Zindler A (1990) Calibration of the 14C timescale over the past 30,000 years using mass spectrometric U-Th ages from Barbados corals. Nature 345: 405–410
Barrientos OOP (1979) Revision der Gattung Pediastrum Meyer (Chlorophyta). Diss Bot (Bibliotheca Phycologica 48), Cramer, Vaduz
Bonnefille R, Riolet G (1980) Pollens des savanes d'Afrique orientale. Éditions CNRS, Paris
Brenac P (1988) Evolution de la végétation et du climat dans l'Ouest-Cameroun entre 25,000 et 11,000 ans BP. Inst Francais Pondichéry Trav Sci Tech 25: 91–103
Bronckers F (1967) Palynologie africaine VII. Bull Ifan 29 A(2): 472–473, pl 127–150
Campo M van (1957) Palynologie africaine I. Bull Ifan 19 A(3): 659–678, pl 1–24
Campo M van (1958) Palynologie africaine II. Bull Ifan 20 A(3): 753–760, pl 25–48
Campo M van (1960) Palynologie africaine IV. Bull Ifan 22 A(4): 1166(1199), pl 89–104
Campo M van, Hallé N (1959) Palynologie africaine III. Bull Ifan 21 A(3): 808–818(899), pl 49–88
Campo M van, Bertrand L, Bronckers F, De Keyser B, Guinet P, Roland-Heydacker R (1964) Palynologie africaine V. Bull Ifan 26 A(4): pl 105–120
Campo M van, Bronckers F, Guinet P (1965) Palynologie africaine VI. Bull Ifan 27 A(3): 796–823(842), pl A, B, 121–126
Caratini C, Guinet Ph (eds) (1974) Pollen et spores d'Afrique tropicale. CEGET, CNRS, Paris
Dupont LM (1993) Vegetation zones in NW Africa during the Brunhes Chron reconstructed from marine palynological data. Quat Sci Rev 12: 189–202
Dupont LM, Agwu COC (1991) Environmental control of pollen grain distribution patterns in the Gulf of Guinea and offshore NW-Africa. Geol Rundsch 80: 567–589
Dupont LM, Agwu COC (1992) Latitudinal shifts of forest and savanna in NW Africa during the Brunhes chron: further marine palynological results from site M 16145 (9°N 19°W). Veget Hist Archaeobot 1: 163–175
Dupont LM, Marret F, Winn K (submitted) Land-sea correlation by means of terrestrial and marine palynomorphs from the eastern Gulf of Guinea: phasing of SE trade winds and the oceanic productivity. Palaeogeogr Palaeoclimatol Palaeoecol
Edwards LE, Andrle VAS (1992) Distribution of selected dinoflagellate cysts in modern marine sediments. In: Head MJ, Wrenn JA (eds) Neogene and Quaternary Dinoflagellate Cysts and Acritarchs. American Assoc Stratigr Palyn, Salt Lake City: 259–288
Elenga H, Schwartz D, Vincens A (1992) Changements climatiques et action anthropique sur le littoral congolais au cours de l'Holocène. Bull Soc géol France 163: 83–90
Elenga H, Schwartz D, Vincens A (1994) Pollen evidence of late Quaternary vegetation and inferred climate changes in Congo. Palaeogeogr Palaeoclimatol Palaeoecol 109: 345–356
Elenga H, Vincens A, Schwartz D (1991) Presence d'elements forestiers montagnards sur les Plateau Bateke (Congo) au Péistocène supérieur: Nouvelles donées palynologiques. Palaeoecol Africa 22: 239–252
Fensome RA, Taylor FJR, Norris G, Sarjeant WAS, Wharton DI, Williams GL (1993) A classification of living and fossil dinoflagellates. Micropaleontology Special publications 7: 352p
Guers J (1970) Palynologie africaine X. Bull Ifan 22 A(4): 312–316(365), pl 191–214
Guers J, Callen-Lobréau D, Dimon MT, Maley J, Cambou-Bou G (1971) Palynologie africaine XI. Bull Ifan 33 A(2): pl 215–238
Guinet Ph (1968) Palynologie africaine VIII. Bul Ifan 30 A(3): pl 151–166
Hamilton A (1976) The significance of patterns of distribution shown by forest plants and animals in tropical Africa for the reconstruction of Upper Pleistocene palaeoenvironments: a review. Palaeoecol Africa 9: 63–97
Hayward D, Oguntoyinbo J (1987) Climatology of West Africa. Hutchinson, London
Head MJ (1996) Modern dinoflagellate cysts and their biological affinities. In: Jansonius J, McGregor DC (eds) Palynology: principles and applications 3: 1197–1248
Hooghiemstra H, Agwu COC, Beug HJ (1986) Pollen and spore distribution in recent marine sediments: a record of NW-African seasonal wind patterns and vegetation belts. “Meteor” Forsch Ergebn C 40: 87–135
Huang TC (1981) Spore Flora of Taiwan. National Taiwan University, Taipei
Knapp R (1973) Die Vegetation von Afrika. Fischer, Stuttgart
Kolesnikov AG (ed) (1973) Equalant I and Equalant II, Oceanographic Atlas, Volume 1: Physical Oceanography. UNESCO, Paris
Lanfranchi R, Schwartz D (1991) Les remainiements de sols pendant le Quaternaire supérieur au Congo. Evolution des paysages dans la région de la Sangha. Cah ORSTOM, ser Pedol 26(1): 11–24
Lentil JK, Williams GH (1993) Fossil dinoflagellates: Index to Genera and Species 1993 Edition. American Assoc Stratigr Palyn, Contrib Ser 28
Leroux M (1983) Le climat de L'Afrique tropicale. (text, atlas) Edition Champion, Paris
Leroux M (1993) The Mobile Polar High: a new concept explaining present mechanisms of meridional air-mass and energy exchanges and global propagation of palaeoclimatic changes. Global Planet Change 7: 69–93
Lezine AM, Vergnaud-Grazzini C (1993) Evidence of forest extension in West Africa since 22,000 BP: A pollen record from eastern tropical Atlantic. Quat Sci Rev 12: 203–210
Lobreau D, Guers J, Assemien P, Bou G, Guinet Ph, Potier L (1969) Palynologie africaine IX. Bull Ifan 31 A(2): pl 167–190
Lutze GF, Agwu COC, Altenbach A, Henken-Mellies U, Kothe C, Mühlhan N, Pflaumann U, Samtleben C, Sarnthein M, Segl M, Soltwedel T, Stute U, Tiedemann R, Weinholz P (1988) Bericht über die ‘Meteor’-Fahrt 6-5 Dakar-Libreville 15.1–16.2.1988. Ber Geol Paläontol Inst Univ Kiel 22: 60p
Maley J (1987) Fragmentation de la fôret dense humide africaine et extension des biotopes montagnards au Quaternaire récent: nouvelles données polliniques et chronologiques. implications paléoclimatiques et biogéographiques. Palaeoecol Africa 18: 307–336
Maley J, Brenac P (1987) Analyses polliniques préliminaires de quaternaire récent de l'Ouest Cameroun: mise en évidence de refuges forestiers et discussion des problèmes paléoclimatiques. Mém Trav EPHE Inst Montpellier 17: 129–142
Maley J, Brenac P (1996) Vegetation and climatic changes in the forests of West Cameroon during the last 25,000 years. Abstracts 9th IPC (Houston, Texas): 94–95
Maley J, Livingstone DA (1983) Extension d'un élément montagnard dans le sud du Ghana (Afrique de l'Ouest) au Pléistocène supérieur et a l'Holocène inférieur premières données polliniques. CR Acad Sc Paris 296: 1287–1292
Marret F (1994a) Evolution paléoclimatique et paléhydrologique de l'Atique est-equatoriale et du proche continent au quaternaire terminal. Contribution palynologique (Kystes des dinoflagellés, pollen et spores). Thesis, University Bordeaux I, Talence
Marret F (1994b) Distribution of dinoflagellate cysts in recent marine sediments from the east Equatorial Atlantic (Gulf of Guinea). Review Palaeobot Palynol 84: 1–22
Martinson DG, Pisias NG, Hays JD, Imbrie J, Moore Jr TC, Shackleton NJ (1987) Age dating and the orbital theory of the ice ages: development of a high-resolution 0 to 300,000-year chronostratigraphy. Quat Res 27: 1–29
Mcminn A, Sun X (1994) Recent dinoflagellate cysts from the Chatham Rise, Southern Ocean, east of New Zealand. Palynology 8: 41–58
Morzadec-Kerfourn MT (1976) La signification écologique des dinoflagellés et leur intérêt pour l'étude des variations du niveau marin. Rev Micropaléont 18: 229–235
Morzadec-Kerfourn MT (1992) Estuarine dinoflagellate cysts among oceanic assemblages of Pleistocene deep-sea sediments from the West African margin and their paleoenvironmental significance. In: Head MJ, Wrenn JH (eds) Neogene and Quaternary Dinoflagellate Cysts and Acritarchs. American Assoc Stratigr Palyn, Dallas: 133–146
Nayar BK, Lata P, Tiwari LP (1964) Spore morphology of the ferns of West Tropical Africa. Pollen Spores 6: 545–582
Oliver R (1991) The African Experience. Harper Collins, New York
Pastouret L, Chamley H, Delibras G, Duplessy JC, Thiede J (1978) Late Quaternary climatic changes in western tropical Africa deduced from deep-sea sedimentation off the Niger delta. Oceanol Acta 1: 217–232
Peterson RG, Stramma L (1991) Upper-level circulation in the South Atlantic Ocean. Progr Oceanogr 26: 1–73
Péwé TL (1981) Desert dust: an overview. In: Péwé TL (ed) Desert dust: origin, characteristics and effect on man. Geological Society of America, special paper 186: 1–10
Ploey J de (1969) Report on the Quaternary of western Congo. Palaeoecol Africa 4: 65–68
Powel AJ, Dodge JD, Lewis J (1990) Late Neogene to Pleistocene palynological facies of the Peruvian continental margin upwelling, leg 112. In: Suess E, Huene R von, and others (eds) Proceedings ODP, Scientific Results 112. Ocean Drilling Program, College Station, TX: 297–321
Schnell R (1976) La flore et la végétation de l'Afrique tropicale, part 1. Gauthier-Villars, Paris
Schnell R (1977) La flore et la végétation de l'Afrique tropicale, part 2. Gauthier-Villars, Paris
Schwartz D, Mariotti A, Trouve C, Borg K van den, Guillet B (1992) Études des profils isotopiques 13C et 14C d'un sol ferrallitique sableux du littoral congolais. Implications sur la dynamique de la matière organique et l'histoire de la végétation. C R Acad Sci Paris t315II: 1411–1417
Sowunmi MA (1973) Pollen grains of Nigerian Plants I. Woody Species. Grana 13: 145–186
Sowunmi MA (1981a) Nigerian vegetational history from the Late Quaternary to the present. Palaeoecol Africa 13: 217–234
Sowunmi MA (1981b) Late Quaternary environmental changes in Nigeria. Pollen Spores 23: 125–148
Sowunmi MA (1986) Change of vegetation with time. In: GW Lawson (ed) Plant Ecology in West Africa. Wiley, New York, pp 273–307
Talbot MR, Livingstone DA, Palmer PG, Maley J, Melack JM, Délibrias G, Gulliksen S (1984) Preliminary results from sediment cores from Lake Bosumtwi, Ghana. Palaeoecol Africa 16: 173–192
Thom BG (1967) Mangrove ecology and deltaic geomorphology: Tabasco, Mexico. J Ecol 55: 301–343
Turon JL (1984) Le palynoplancton dans l'environnement de l'Atlantiquenord-oriental. Evolution climatique et hydrologique depuis le dernier maximum glaciaire. Mém Inst Géol Basse Aquitaine 17
Turon JL, Londeix L (1988) Les assemblages de kystes de dinoflagellés en Méditerranée occidentale (Mer d'Alboran), mise en évidence des paléoenvironnements depuis le dernier maximum glaciaire. BCREP (Elf Aquitaine) 12: 313–344
Ueno J (1960) Palynological notes of Podocarpaceae. Acta Phytotax Geobot 18: 198–208
Vernal A de, Mudi PJ, Harland R, Morzadec-Kerfourn MT, Turon JL, Wrenn JH (1992) Quaternary organic-walled dinoflagellate cysts of the North Atlantic Ocean and adjacent seas: ecostratigraphy and biostratigraphy. In: Head MJ, Wrenn JH (eds) Neogene and Quaternary Dinoflagellate Cysts and Acritarchs. American Assoc Stratigr Palyn, Dallas: 289–328
Versteegh GJM (1994) Recognition of cyclic and non-cyclic environmental changes in the Mediterranean Pliocene: A palynological approach. Marine Micropaleontol 23: 147–183
Wall D, Dale B (1966) “Living fossils” in western Atlantic plankton. Nature 211: 1025–1026
Wall D, Dale B, Lohmann GP, Smith WK (1977) The environmental and climatic distribution of dinoflagellate cysts in modern marine sediments from regions in the North and South Atlantic Oceans and adjacent seas. Marine Micropaleontol 2: 121–200
Walter H, Lieth H (1960) Klimadiagramm-Weltatlas II. Fischer, Jena
White F (1983) The vegetation of Africa. Natural Rescourses Research, 20. UNESCO
Williams DB (1971) The distribution of marine dinoflagellates in relation to physical and chemical conditions. In: Funnel BM, Riedel WR (eds) The micropalaeontology of oceans. Cambridge University Press, London: 91–95
Ybert JP (1979) Atlas de pollens de Côte d'Ivoire. ORSTOM, Paris
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Dupont, L.M., Weinelt, M. Vegetation history of the savanna corridor between the Guinean and the Congolian rain forest during the last 150,000 years. Veget Hist Archaebot 5, 273–292 (1996). https://doi.org/10.1007/BF00195296
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DOI: https://doi.org/10.1007/BF00195296